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generate_sessions.js
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generate_sessions.js
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var fs = require('fs');
var util = require('util');
var path = require('path');
var request = require('request');
var c = require('../config.js');
var Splitflap = require('../lib/splitflap.js');
var pause = 15;
var knownHashsFilename = './data/knownHashs.json';
var videoFolder = './web/video/';
var feedFolder = './web/feeds/';
var videoFeedTemplate = fs.readFileSync('./data/feed_video.template', 'utf8');
var stageFeedTemplate = fs.readFileSync('./data/feed_stage.template', 'utf8');
var flaps = [
{key:'header', font:'800', x:48, dy:48, length:29, gap:3},
{key:'time1', font:'400', x:48, dy:90, length:29, gap:3},
{key:'title1', font:'800', x:48, dy:14, length:29, gap:3},
{key:'title1', font:'800', x:48, dy:14, length:29, gap:3},
{key:'speaker1', font:'400', x:48, dy:14, length:29, gap:3},
{key:'time2', font:'400', x:48, dy:90, length:29, gap:3},
{key:'title2', font:'800', x:48, dy:14, length:29, gap:3},
{key:'title2', font:'800', x:48, dy:14, length:29, gap:3},
{key:'speaker2', font:'400', x:48, dy:14, length:29, gap:3}
]
var state0 = {
header: '',
time1: '',
title1: '',
speaker1: '',
time2: '',
title2: '',
speaker2: ''
}
var monitore = [
{ name:'monitor1', stages:['STG-1','STG-4','STG-7','STG-10']},
{ name:'monitor2', stages:['STG-2','STG-5','STG-8','STG-11']},
{ name:'monitor3', stages:['STG-3','STG-6','STG-9','STG-J' ]}
]
var stages = [
{ name:'STG-1', filename:'stage1', currentSession:false },
{ name:'STG-2', filename:'stage2', currentSession:false },
{ name:'STG-3', filename:'stage3', currentSession:false },
{ name:'STG-4', filename:'stage4', currentSession:false },
{ name:'STG-6', filename:'stage6', currentSession:false },
]
var stageLookup = {};
stages.forEach(function (stage) { stageLookup[stage.name] = stage });
var knownHashs = {};
if (fs.existsSync(knownHashsFilename)) {
knownHashs = fs.readFileSync(knownHashsFilename, 'utf8');
knownHashs = JSON.parse(knownHashs);
}
Splitflap(flaps, function (splitflap) {
var todos = {};
var queue = {};
var _sessions = [];
var todoCount = 0;
var todoRunning = false;
var nightTimeOffset = 4*3600;
checkData();
setInterval(checkData, c.sessions.updateDataEvery*1000);
checkFeed();
setInterval(checkFeed, c.sessions.updateFeedEvery*1000);
checkStageFeed();
setInterval(checkStageFeed, c.sessions.updateFeedEvery*1000);
function checkStageFeed() {
console.log('checkStageFeed');
var time = (new Date()).getTime()/1000;
var nightTime = Math.ceil((time-nightTimeOffset)/86400)*86400 + nightTimeOffset;
stages.forEach(function (stage) {
stage.currentSession = false;
})
_sessions.forEach(function (session) {
if (session.endT < time) return;
if (session.beginT > nightTime) return;
if (!stageLookup[session.location]) return;
stage = stageLookup[session.location];
if (!stage.currentSession) return stage.currentSession = session;
if (stage.currentSession.beginT > session.beginT) stage.currentSession = session;
})
stages.forEach(function (stage) {
var title;
if (stage.currentSession) {
title = stage.currentSession.title;
if (stage.currentSession.beginT > time) title = 'next: '+title;
} else {
title = '';
}
var rss = stageFeedTemplate.replace(/\{\{.*?\}\}/g, function (key) {
key = key.substr(2, key.length-4);
switch (key) {
case 'stage': return stage.name;
case 'title': return title;
default:
console.error('Unknown template key "'+key+'"');
}
})
console.log('write "'+feedFolder+stage.filename+'.rss"');
fs.writeFileSync(feedFolder+stage.filename+'.rss', rss, 'utf8');
})
}
function checkFeed() {
console.log('checkFeed');
var time = (new Date()).getTime();
var entryError = false;
monitore.forEach(function (monitor) {
monitor = monitor.name;
var nextEntry = false;
Object.keys(queue).forEach(function (key) {
var entry = queue[key];
if (entry.monitor != monitor) return;
if (entry.startTime > time) return;
if (!nextEntry) return (nextEntry = entry);
if (nextEntry.startTime < entry.startTime) nextEntry = entry;
})
if (!nextEntry) {
console.error('Entry not found!');
entryError = true;
return;
}
var feed = videoFeedTemplate.replace(/\{\{.*?\}\}/g, function (key) {
key = key.substr(2, key.length-4);
switch (key) {
case 'monitor': return monitor;
case 'host': return c.host;
case 'filename': return nextEntry.filename;
case 'hash': return nextEntry.hash;
case 'filesize': return nextEntry.filesize;
default:
console.error('Unknown template key "'+key+'"');
}
})
var filename = feedFolder+monitor+'.rss';
console.log('Write "'+filename+'"');
fs.writeFileSync(filename, feed, 'utf8');
})
if (entryError) {
console.error('queue is:');
console.error(util.inspect(queue));
}
}
function checkTodo() {
if (todoRunning) return;
todoRunning = true;
var _todos = Object.keys(todos).map(function (key) { return todos[key]; });
if (_todos.length <= 0) {
todoRunning = false;
return;
}
console.log('checkTodo');
_todos.sort(function (a,b) { return b.order - a.order; })
var todo = _todos.pop();
console.log('Generating "'+todo.filename+'"');
splitflap.renderMovie(todo.screenplay, videoFolder+'temp.mp4', function () {
checkFolder(path.dirname(videoFolder+todo.filename));
fs.renameSync(videoFolder+'temp.mp4', videoFolder+todo.filename)
knownHashs[todo.hash] = {
filename: todo.filename,
filesize: fs.statSync(videoFolder+todo.filename).size
}
fs.writeFileSync(knownHashsFilename, JSON.stringify(knownHashs, null, '\t'), 'utf8');
todoRunning = false;
delete todos[todo.hash];
checkTodo();
});
}
function checkData() {
console.log('checkData');
queue = {};
var sessions = loadData();
_sessions = sessions;
var time0 = (new Date()).getTime()/1000;
todoCount = 0;
for (var t = 0; t < c.sessions.future; t += c.sessions.loopTimeStep) {
var time = Math.floor((time0 + t)/c.sessions.loopTimeStep)*c.sessions.loopTimeStep;
var time_str = (new Date((time+2*3600)*1000)).toISOString().substr(0,16);
var nightTime = Math.ceil((time-nightTimeOffset)/86400)*86400 + nightTimeOffset;
//console.log((new Date((nightTime+2*3600)*1000)).toISOString().substr(0,16))
monitore.forEach(function (monitor) {
var screenplay = [state0,0];
monitor.stages.forEach(function (stage) {
var s0 = false; // current session
var s1 = false; // next session
sessions.forEach(function (session) {
if (session.location != stage) return;
if ((session.beginT <= time) && (time < session.endT)) s0 = session;
if ((session.beginT > time) && (session.beginT < nightTime)) {
if (!s1) {
s1 = session;
} else {
if (session.beginT < s1.beginT) s1 = session;
}
}
})
var state = { header: stage };
if (s0) {
state.time1 = 'now running: '+sessionTime(s0);
state.title1 = s0.title;
state.speaker1 = s0.speakers;
} else {
state.time1 = s1 ? 'ready for boarding' : 'no more sessions today';
state.title1 = '';
state.speaker1 = '';
}
if (s1) {
state.time2 = 'next: '+sessionTime(s1);
state.title2 = s1.title;
state.speaker2 = s1.speakers;
} else {
state.time2 = '';
state.title2 = '';
state.speaker2 = '';
}
screenplay.push(state, pause);
})
screenplay.push(state0);
var hash = splitflap.getHash(screenplay);
if (knownHashs[hash] && !queue[hash]) {
queue[hash] = {
hash:hash,
monitor:monitor.name,
startTime:(new Date(time*1000)).getTime(),
filename:knownHashs[hash].filename,
filesize:knownHashs[hash].filesize
}
}
if (!knownHashs[hash] && !todos[hash]) {
todos[hash] = {
hash:hash,
startTime:(new Date(time*1000)),
filename:monitor.name+'/'+time_str+'_'+hash+'.mp4',
order:todoCount,
screenplay:screenplay
}
todoCount++;
}
})
}
checkTodo();
}
})
function sessionTime(session) {
return [
session.begin.getHours(),
':',
(session.begin.getMinutes()+100).toFixed(0).substr(1),
'-',
session.end.getHours(),
':',
(session.end.getMinutes()+100).toFixed(0).substr(1)
].join('');
}
function loadData() {
console.log('loadData');
var sessions;
try {
sessions = JSON.parse(fs.readFileSync('./data/sessions.json', 'utf8'));
console.log('sessions.json loaded');
} catch (e) {
sessions = [];
console.error('sessions.json defect, starting with [], error was "'+e+'"');
}
try {
console.log('downloading "sessions.json"');
request('http://data.re-publica.de/data/rp15/sessions.json', function (error, response, body) {
if (error) return console.error('ERROR:download of "sessions.json" was "'+e+'"');
var test = JSON.parse(body);
fs.writeFileSync('./data/sessions.json', body, 'utf8');
console.log('download of "sessions.json" was successful');
});
} catch (e) {
console.error('ERROR:download of "sessions.json" was "'+e+'"');
}
sessions = sessions.filter(function (session) {
if (!session.begin) return false;
if (!session.end) return false;
if (!session.duration) return false;
if (!session.location) return false;
session.begin = new Date(session.begin);
session.beginT = session.begin.getTime()/1000;
session.end = new Date(session.end);
session.endT = session.end.getTime()/1000;
session.location = session.location.label_de;
session.speakers = session.speakers.map(function (speaker) { return speaker.name }).join(', ');
return true;
})
return sessions;
}
function checkFolder(folder) {
if (!fs.existsSync(folder)) {
checkFolder(path.dirname(folder));
fs.mkdirSync(folder);
}
}